[openstack-dev] [nova] usefulness of device parameter at volumeAttachment

Géza Gémes geza.gemes at ericsson.com
Mon May 25 17:12:36 UTC 2015


Thank you!

I'll try it out and check whether it works there. Otherwise I think it 
would be good to get rid of it.

Best regards,

Geza

On 05/24/2015 11:10 PM, Fox, Kevin M wrote:
> Honestly, I dont know. I dont use either. Just heard it was broken in 
> kvm, but it was there because of xen.
>
> Thanks,
> Kevin *
> *
> ------------------------------------------------------------------------
> *From:* Géza Gémes
> *Sent:* Sunday, May 24, 2015 1:07:01 AM
> *To:* openstack-dev at lists.openstack.org
> *Subject:* Re: [openstack-dev] [nova] usefulness of device parameter 
> at volumeAttachment
>
> libvirt/xen or xenapi? PVM or HVM?
>
> Thank you!
>
> Geza
>
> On 05/23/2015 02:21 PM, Fox, Kevin M wrote:
>> I believe xen supports it.
>>
>> Thanks,
>> Kevin *
>> *
>> ------------------------------------------------------------------------
>> *From:* Géza Gémes
>> *Sent:* Saturday, May 23, 2015 2:00:32 AM
>> *To:* OpenStack Development Mailing List (not for usage questions)
>> *Subject:* [openstack-dev] [nova] usefulness of device parameter at 
>> volumeAttachment
>>
>> Hi,
>>
>> When someone calls nova volume-attach or the block-device-mapping
>> parameter at boot, it is possible to specify a device name for the
>> guest. However I couldn't find any guest OS which would honor this. E.g.
>> with libvirt/kvm, if the guest has two virtio disks already (vda and
>> vdb), specifying vdf would be ignored and the disk will be attached as
>> vdc in the guest.
>> I propose to deprecate this option and at boot where it is not optional
>> to accept only auto as an option.
>>
>> Best regards,
>>
>> Geza
>>
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>
>
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